(2002). Poverty: Biggest threat to Southeast Asian biodiversity conservation. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Poverty: Biggest Threat to Southeast Asian Biodiversity Conservation." Manila Bulletin 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Poverty: Biggest Threat to Southeast Asian Biodiversity Conservation." Manila Bulletin, 2002.
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